| Lago Ritom | |
|---|---|
 | |
  Lago Ritom  Lago Ritom  Lago Ritom | |
| Location | Piora Valley, Ticino |
| Coordinates | 46°32′24″N 8°41′21″E / 46.54000°N 8.68917°E |
| Type | reservoir, natural lake |
| Basin countries | Switzerland |
| Surface area | 1.49 km2 (0.58 sq mi) |
| Max. depth | 69 m (226 ft) |
| Water volume | 48 million cubic metres (39,000 acre⋅ft) |
| Surface elevation | 1,850 m (6,070 ft) |
 | |
Lago Ritom is a lake in the Piora valley, Ticino, Switzerland. The natural lake is used as a reservoir by the Swiss Federal Railways (SBB-CFF-FFS) to generate hydro-electric power for the Gotthard line. The first dam was built in 1918 and, in 1950, its height was increased by 23 m.